Syntheses and structures of lithium cyanocuprates containing the C(SiMe3)3, C(SiMe3)2(SiMe2NMe2) and C(SiMe3)(SiMe2OMe)2 groups
Eaborn, Colin; El-Hamruni, Salima M.; Hill, Michael S.; Hitchcock, Peter B.; David Smith, J.; Eaborn Colin; School of Chemistry, Physics and Environmental Science, University of Sussex; El-Hamruni Salima M.; Department of Chemistry, Faculty of Science, Al-Fatih University; Hill Michael S.; School of Chemistry, Physics and Environmental Science, University of Sussex; Hitchcock Peter B.; School of Chemistry, Physics and Environmental Science, University of Sussex; David Smith J.; School of Chemistry, Physics and Environmental Science, University of Sussex
Журнал:
Journal of the Chemical Society, Dalton Transactions
Дата:
2002
Аннотация:
The â lower orderâ lithium cyanocuprates [Li(thf)2NCCu{C(SiMe3)3}]2 (1d), [Li(thf)2NCCu{C(SiMe3)2(SiMe2NMe2)}]2 (1e) and [Li(thf)NCCu{C(SiMe3)(SiMe2OMe)2}]2 (3) have been obtained from the reactions between copper(i) cyanide and the corresponding organolithium compounds. The compounds 1d and 1e have molecular structures containing four-membered Li2N2 rings but in 3 the lithium is coordinated by the methoxy groups of the ligand and almost linear LiNCCuC sequences are incorporated into fourteen-membered rings. Attempts to make â higher orderâ cyanocuprates containing tri(organosilyl)methyl groups were unsuccessful and no reactions were observed when the cyanocuprate 1d was treated with alkyl halides or enones.
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